Chapter 17.3, Problem 17.3BFP

Interpretation Introduction

Interpretation:

${\text{K}}_{\text{c}}$ for the given reaction ${\text{CS}}_{\text{2(g)}}{\text{ + 4H}}_{\text{2(g)}}\underset{}{\rightleftharpoons }{\text{ CH}}_{\text{4(g)}}{\text{ + 2H}}_{\text{2}}\text{S(g)}$ has to be calculated.

Concept Introduction:

Relation between ${\text{K}}_{\text{p}}$ and ${\text{K}}_{\text{c}}$:

The relation between and ${\text{K}}_{\text{p}}$ and ${\text{K}}_{\text{c}}$ is given by the following equation.

  ${\text{K}}_{\text{p}}{\text{ = K}}_{\text{c}}{\text{(RT)}}^{\Delta \text{ngas}}$

Where,

${\text{K}}_{\text{p}}$ is the equilibrium constant in terms of partial pressure

${\text{K}}_{\text{c}}$ is the equilibrium constant in terms of concentration

$\Delta \text{n(gas) = moles of gaseous product - moles of gaseous reactant}$

Only moles of gaseous products and reactants is used to calculate $\Delta \text{ngas}$